ERR_TEMP_HIGH
Critical
Antminer S21 – Temperature Too High
over max temp
Critical — Immediate action required
Affected Models:
Antminer S21, S21 Pro, S21 Hydro
Symptoms
- Miner shuts down with temperature error
- Hashboard temperatures exceed 95°C
- Fans running at maximum speed
Step-by-Step Fix
1
Power off immediately and wait 15 minutes for cooling.
2
Verify ambient temperature is below 35°C.
3
Clean all dust from heatsinks and air channels with compressed air.
4
Inspect fans for proper operation and replace any failed units.
5
Ensure intake and exhaust paths are not obstructed.
6
Check thermal paste on ASIC chips — reapply if dried or cracked.
Related Error Codes
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